/*
 twi.h - TWI/I2C library for Wiring & Arduino
 Copyright (c) 2006 Nicholas Zambetti.  All right reserved.

 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef twi_h
#define twi_h

#include <inttypes.h>

//#define ATMEGA8

#ifndef CPU_FREQ
#define CPU_FREQ 16000000L
#endif

#ifndef TWI_FREQ
#define TWI_FREQ 100000L
#endif

#ifndef TWI_BUFFER_LENGTH
#define TWI_BUFFER_LENGTH 32
#endif

#define TWI_READY 0
#define TWI_MRX   1
#define TWI_MTX   2
#define TWI_SRX   3
#define TWI_STX   4

void twi_init(void);
void twi_setAddress(uint8_t);
uint8_t twi_readFrom(uint8_t, uint8_t*, uint8_t);
uint8_t twi_writeTo(uint8_t, uint8_t*, uint8_t, uint8_t);
uint8_t twi_transmit(uint8_t*, uint8_t);
void twi_attachSlaveRxEvent(void(*)(uint8_t*, int));
void twi_attachSlaveTxEvent(void(*)(void));
void twi_reply(uint8_t);
void twi_stop(void);
void twi_releaseBus(void);

#endif

